Statistics 101: Principles of Statistics Final Exam

Free Practice Test

Free Practice Test Instructions:

Choose your answer to the question and click 'Continue' to see how you did. Then click 'Next Question' to answer the next question.
When you have completed the free practice test, click 'View Results' to see your results.
Good luck!

Are you sure you want to restart your practice test?

Question 11.In a college class, the average IQ is 115. Assume that the distribution is normal and that the standard deviation is 15. What percentage of the class has an IQ between 105 and 130?

54%

28%

59%

45%

Question 22.If z = 2 and -2, what area falls outside these z values on a standard normal curve?

0.081

0.00012

0.024

0.046

Question 33.James is a teacher in a small school is Boston. He is amused to find that his data is normally distributed, with 30 of his students taking a test which has 70 points. The average of their test scores is 36 and the standard deviation is 7. If the distribution is normal, towards which value is this symmetric data centered?

36

30

7

70

Question 44.Which of the following is FALSE regarding the binomial probability distribution?

It is the most often used discrete probability distribution in statistics.

It is calculated based on a formula where p is the significance level for a single event and q is the quantity of data present.

None of the answers are correct.

It is a mathematical construct that is used to model the probability of observing r successes in n trials.

Question 55.The mean score of a medical test is 72.21 with a standard deviation of 2.5. Find a 95% confidence interval for a random sample of 25 students with the following scores.

71.18 to 73.24

72.25 to 72.30

73.45 to 74.65

70.12 to 75.12

Question 66.A random sample is taken and the sample size is 25. The sample is normally distributed, the sample mean is 89, and the standard deviation is 5.5. Find a 90% confidence interval for the population mean.

88.21 to 97.54

87.12 to 90.88

78.69 to 98.34

88.56 to 89.16

Question 77.What is the value of alpha for a 90% confidence interval?

0.01

0.10

0.05

0.25

Question 88.When would you use the t-distribution procedure to find the confidence interval for the population mean?

Only when you have the standard deviation and mean of a normally distributed population.

When you are working a population that does not have a normal distribution.

When the only thing that you know about a population is its size.

When you do not know the standard deviation of a normally distributed population.

Question 99.Which of the following is a way of increasing the power of a hypothesis test?

Using a stratified sampling technique.

Choosing always the 10% of the population.

Decreasing the sample size.

Increasing the sample size.

Question 1010.It has been reported that the mean score for a student who takes the certain test is 80 with a standard deviation of 9. For a random sample of 100 students, what is the standard error?

0.5

0.6

0.9

0.8

Question 1111.Dr. Matthews wants to know how many veterinary students decide to pursue a career as small animal practitioners. There are 27 veterinary schools in the USA, so he decides to randomly select 10% of the students from each school and asks them where they intend to practice once they finish veterinary school. Is this an example of a simple random sample?

No, because every possible student sample did not have an equal chance of being chosen.

Yes, because each student of the 27 colleges had an equal chance of being sampled.

No, because it is impossible to select random samples when working with people.

Yes, because each student was randomly sampled.

Question 1212.A soccer coach wants to know how many hours per week his players spend training at home. He has 20 players and he decides to ask the first 4 players to arrive at the Monday's soccer practice how many hours they spend training per week. He then calculated that they spend an average of 10 hours per week. Therefore, he assumed that all the players train 10 hours per week. Is this an example of a simple random sample?

No, because each student did not have an equal chance of being selected.

No, because he didn't sample every soccer player.

Yes, because each student had an equal chance of being selected.

Yes, the minimum number of students sampled needs to be four for it to be a simple random sample.

Question 1313.The chart displays the relative frequency of political affiliation of students who have enrolled in a History 101 class in the United Kingdom. If there are 150 students in the class, how many of them support the Conservative Party?

75

65

60

40

Question 1414.Data on the result of an exam in high school was collected. Which of the following BEST describes this form of visual representation of data?

Histogram

Gauss chart

Pie chart

A Ishikawa diagram

Question 1515.The histogram below shows the results from a Math 101 exam. Which of the following best describes this data?

Tell us about yourself

Are you a student or a teacher?

Choose your answer to the question and click 'Continue' to see how you did. Then click 'Next Question' to answer the next question.
When you have completed the free practice test, click 'View Results' to see your results.
Good luck!

Students Love Study.com

Earn College Credit

Over 65 million users have prepared for
{{displayNameByProductKey[registrationData.product || cocoon]}} and other
exams on Study.com

Teachers Love Study.com

"The videos have changed the way I teach! The videos on Study.com accomplish in
5 minutes what would take me an entire class."

- Chris F.

Teachers Love Study.com

"It provides a quick and engaging way to cover material needed to understand readings we are covering in class."

Teresa P.

Ohio, United States

"It provides a quick and engaging way to cover material needed to understand readings we are covering in class."

Teresa P.

Ohio, United States

"A teacher friend recommended Study.com for social studies. I enjoy assigning the videos to my students. The videos are short, to the point, and the quiz allows me to test their knowledge on whatever subject in social studies I am teaching at the time."

Nancy A.

Ohio, United States

"Every time I have searched for a lesson, there has been a perfect match to my needs as a middle school teacher of science, and algebra."

Kathy S.

New Jersey, United States

"Your lessons are very well developed, especially the videos that use analogies for scientific phenomena. Great way to memorize science concepts."

Lusy D.

California, United States

"I love the way the lessons are laid out in small chunks with quizzes to make sure you understand a concept before moving on. Excellent!"

Brandy K.

"I am a 7th-grade teacher and often use it for language arts and world history. The students find it quite engaging. On a professional note, it has helped me pass 2 out of the for 4 Single Subject CSET English Exams! Now I am using it to help me pass the last 2 subtest exams."

Scott S.

California, United States

"As a math/science tutor I find these lessons extremely helpful when introducing concepts to my students or reinforcing what they have been taught."

Tim H.

Barbados

"I like that students can retake quizzes until they achieve a perfect score. I also like the
ability to create "guided note templates" from the transcripts of each video lesson."

Jaime B.

Teacher, High School 9-12 Computer Science

West Plains, MO

Over 65 million users have prepared for
{{displayNameByProductKey[registrationData.product || cocoon]}} and other
exams on Study.com

Over 65 million users have prepared for
{{displayNameByProductKey[registrationData.product || cocoon]}} and other
exams on Study.com